Which structure is composed of phospholipids and regulates the movement of substances in and out of cells?

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#Question id: 11033

#Unit 7. System Physiology – Animal

The velocity of blood flow is the lowest in capillaries because ________.

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#Question id: 5450

#Unit 8. Inheritance Biology

Which of these definitions of heritability is most correct?

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#Question id: 24245

#Unit 4. Cell Communication and Cell Signaling

Following statements are regarding to Integrins receptors;

a. Integrins are the principal receptors used by animal cells to bind to the extracellular matrix. 

b. Integrins function as transmembrane linkers (integrators) between the extracellular matrix and the actin cytoskeleton. 

c. An integrin molecule is composed of four covalently associated transmembrane glycoprotein subunits called α2 and β2.

d. Integrins bind extracellular matrix (ECM) glycoproteins, Laminins, Collagens, Fibronectin and Vitronectin.

Which of the following statements are incorrect?

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#Question id: 19162

#Unit 13. Methods in Biology

Which of the following is not a gel filtration chromatography?

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#Question id: 31146

#Unit 2. Cellular Organization

Certain integral ER membrane proteins are specifically recruited into COPII vesicles for transport to the Golgi. The cytosolic segments of many of these proteins contain a sorting signal, known as: